Rubber assisted sheet metal forming has always been the subject of
research for last 50 years.
Rubber diaphragm is primarily
used to improve the formability of the sheet metal components having complex
features. In this paper, three varieties of rubber viz. Natural rubber, B-
nitrile rubber and Silicon rubber are used to form the hemispherical part made
out of pure copper. The rubbers are manufactured in such a way to achieve the
same hardness level so that proper comparison could be made. The same part is
formed under three rubber diaphragms and thickness reduction is compared. The
present paper gives the detail account of rubber chemical composition, forming
set up and comparison of thickness reduction in the part after forming.
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